Switch-machine.



G. B. GRAY.

SWITCH MACHINE.

APPLICATION FILED FEB. 5. 1916.

Patented Feb. 5, 1918.

5 SHEETS-SHEET 1.

ATTORNEY G. B. GRAY.

SWITCH MACHINE,

APPLICATION FIL'ED FEB. 5, 19m.

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A TTOR/VEY G. B. GRAY.

SWITCH IViACHlNE. APPLICATION FILED FEB. 5. 1916.

Patented 1 6b. 5, 1918.

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- SWITCH MACHINE.

APPLICATION .HLED FEB. 5. me.

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GARDNER B. GRAY, OF PITTSBURGH, IPENNSYLVANIA.

SWITCH-1VIACHINE.

Specification of Letters Patent.

Patented Feb. 5, 191...

Application filed February 5, 1916. Serial No. 76,481.

new and useful Improvements in Switch Machines, of which the following is a speci fication.

This invention relates to improvements in switch machines and more particularly to that class of apparatus in which electric appliances are provided for controlling and operating the switch moving devices; This application is a continuation in part of up plication Ser. No. 727,505 filed Oct. 24, 1912.

The invention resides mainly in a switch machine composed of two units and the pro vision of means for preventing the actuation of either unit except in the proper sequence of operation in which the function performed by that unit should occur.

An object of the invention is to overcome certain defectsheretofore existing in such apparatus by increasing the safeguarding means by which the mechanism is protected against a false operation.

A feature of the invention resides in the means whereby a part of the switch moving apparatus is locked against operation while another part is being actuated. Another feature is the provision of means in the switch machine itself for protection against false movement.

In the preferred embodiment for locking one part of the switch operating apparatus against movement while another part is being actuated two auxiliary locking devices are employed. One of these locking devices is associated with the actuating means for the throw rod, while the other locking device is associated with the actuating means for locking and unlocking the lock rod. The apparatus is so arranged that the auxiliary locking device associated with the throw rod controls the supply of power to the actuating means for unlocking the switch and at the same time prevents the switch from being moved by locking some member. connected to the throw rod or to the actuating means therefor. Conversely. the auxiliary locking device associated with the lock rod governs the supply of power to the actuatmg means for the throw rod-andiwill at the same time additionally lock the locking member for the lock rod. unless the switch has previously been unlocked. The auxiliary locking devices may take any form but in the particular disclosure here made solenoids are utilized. the coils of which act to lock the locking member associating with the lock rod or the rotatable member which actuates the throw rod, as the case may be.

Other features of construction, combination of parts and arrangement of elements will appear as the specification proceeds.

In the accompanying drawings:

Figure 1 is a plan view of a preferred form of switch machine embodying the inventlon.

Fig. 2 is a side view partly in elevation and partly in section of the device.

Fig. 3 is a view taken along line 3-8 of Fig. 1 showing a detail of the switch looking rod.

Fig. 1 is a view taken along the line 4-4 r of Fig. 1 showing a detail of the switch throwing rod and the operating means therefor.

Fig. 5 is a view taken along the line 5-5 of Fig. 1 showing in detail a return im pulse generator and the operating means therefor.

Fig. 6 is a view taken along the line 6-6 of Fig. 1 showing the motor shaft locking means in detail.

Fig. 7 is a view taken along line 7-7 of Fig. 1 showing the external structure of the differential transmission device.

Fig. 8 is a longitudinal sectional view of the differential transmission mechanism.

Fig. 9 is a view showing the construction of the return impulse generator controlled by the locking mechanism together with the lock member locking means.

Fig. 10 is a diagrammatic view of the switch machine showing its relation to a track switch.

Fig. 11 is a view similar to Fig. 4 showing the mechanism arranged in locking position.

In the drawings a track switch is shown at 1. The switch throw rod 2 is adapted to be reciprocated from the motor 3 through the shafts 4 and 5 and the crank 6 which en- A switch lock rod 8 is provided with the notches 9 and 10 which are adapted to be engaged by thelock-ing lug 11 on the plunger '12 to lock the switch 1 in either the normal position which directs trams along the main track, or in the reverse position which diverts trains to a branch track. The double solenoid 1313 serves as the actuating means for moving the plunger 12 and the locking lug 11 carried thereby to its locking and unlocking positions. 1

At 14 is shown a circuit controller arranged to be actuated through the arm 15 engaging with a cam 16 on the driven shaft 5.

The controller 14 in its different positions governs the operation ofthe auxiliary means shown at 17 for locking the plunger 12 against operation in the event that the plungerhas not been moved to lock rod releasing position before themotor 3 is operated to actuate the switch throw rod. A corresponding circuit controller 17 is actuated through an arm 18 from the plunger 12 to transmission mechanism 20 provided with the drums 21 and 22 is utilized. Friction bands 23 and 24 are adapted to engage and grip the respective drums 21 and 22 to hold one or the other of said drums against rotation to thereby control the direction of rotation of driven shaft 5. Solenoid cores 25 and 26 operating through the bell crank le-.

vers 27 and 28 are adapted to move the brake bands into drum holding position. The coils 29 and 30 which operate the cores 25 and 26 are arranged to be selectively energized in accordance with the position of the circuit controller 14 already referred to. The expansion springs 31 and 32 are provided for normally holding the bands in non-gripping position.

The construction of the differential transmission is illustrated in Fig. 8 of the drawing. The motor shaft 4 has keyed thereto the gear 33. The internal gear 34 is keyed tothe driven shaft 5 and carries looselyon the hub thereof the supporting member 35. A corresponding supporting member 36 is carried by the'motor shaft 4 and the two supporting members 35 and 36 are connected by the pins 37 which cause them to rotate in unison. Mounted loosely on the pins 37 are the sleeves 38 which have keyed thereto the three pinion 39, 40' and 41. The pinion 39 is rotated by the gear 33 and meshes with the internal gear'34. The pinion 40, which is'of slightly greater diameter than the pinion 39', is rotated by the sleeve-38 and meshes with the internal gear 42 of the drum 21. The pinion 41, which is the smallest in diameter of the three pinions, is rotated by the sleeve 38 and meshes with the internal gear 43 of the drum 22.

If new the motor shaft 4 is rotated and the shaft 5 is held against rotation, the gear 33, meshing with the pinions 39 will cause them, and the sleeves 38, to rotate. The pulleys 21 and 22 being free to revolve, and the internal. gear 34 being held against rotation, the pinions 39 will revolve by traveling on the internal gear 34 and carry the sleeves 38 and the supporting members 3:") and 36 with them. The rotation and revolution of the sleeves 38 and the pinions 40 and 41 will cause the latter to travel on the internal gears 42 and 43 and will. cause said 1 ion 40 will cause the latter to travel on the immovably held internal gear 42, causing the sleeves 38, pins 37 and members 35 and 36 to revolve. The pinion 39 will tend to travel on the gear 34, butsince the peripheral speed of the pinion. 39 is less than that of pinion 40, said pinion 39 will drag the gear 34 with 'it and cause it to revolve and with it the shaft 5. The drum 22 being movable will also revolve by the action on the pinion 41 on the internal gear 42.

Assume now that the shaft 5 is still free to rotate, that the magnet 29 is deenergized,

the band 23 released,- and drum 21 free to revolve. If now the magnet 30 is energized, the core 26 thereof will be withdrawn thereby tightening the band 24 to hold the drum 22 immovable. The rotation of the sleeves 38 and pinion 41 will cause the latter to travel on the rigidly held internal gear 43, causing the sleeves 38, pins 37 and members 35 and 36 to revolve. The pinion 39 will tend to travel on internal gear 34, but since the peripheral speed of the pinion 39 is greater than that of pinion 41, said pinion 39 will lag behind and will actually push back the gear-34, and cause it to revolv in the opposite direction and with it the driven shaft 5.

p The bell crank levers 27 and 28 which tighten the bands 23 and 24 on the drums have attached to them the ends of the bands. The arm to which one end of the band is attached is longer than the one to which the otherend of the band is attached so that when the bell crank as a whole, is swung about its support the band is made to bind ms'tgeat the periphery of the corresponding drum. The band tightening device is mounted on the supporting arms 44 pivoted at 45 t0 the base 46. As will be obvious these arms will rock on their pivots when the solenoids are energized so that a friction shoe 47 carried by the arms will be forced into engagement with the periphery of the corresponding drum. It will thus be noted that both the friction bands and the friction shoes are imultaneously operable to stop the rotation of the drum to which they are applied.

In Fig. 4 is shown the means for converting the rotary motion of the shaft 5 into the reciprocatory motion of the switch throw rod 2. Mounted on the crank 6 of the shaft 5 is the roller 90 adapted to move in the slideway 7 of the throw rod. In order to permit of a slight movement of the shaft 5 after the switch is moved to its final position, the slideway 7 flares outwardly at 91. By this arrangement the roller 90 emerges from the slideway and is thus disconnected from its operative connection with the throw rod. To guard against any movement of the throw rod during this free movement of the crank roller, lockin members 92 and 93 are provided, the member 92 servingto engage the roller 94 with its outer face to lock the throw rod from movement to the left when the rod has been moved to the right by the action of the roller 90 in the slideway 7. On the other hand, the locking member 93 will have it inner surface brought into engagement with the periphery of the roller 94 to lock the rod from movement to the rightwhen the rod is in its left-hand position.

The means for locking the throw rod actuating shaft against rotation while the lock rod is being unlocked is best shown in Fig- 6. At 48 is shown a framework in which is mounted a solenoid 49 arranged to move a pivoted dog 50 to a position wherein the dog will engage one or the other of the houlders 51 and 52 to hold the shaft 5 against rotation.

At 53 is shown a circuit closer arranged to be actuated in the locking position of the latch arm to close a break in a circuit that operates the lock rod, unlocking device.

Mounted on the shaft 5 is a raised segment 54 which will prevent a movement of the latch member to circuit closing position should the shaft and the switch connected thereto be improperly positioned; By this arrangement the operation of the lock rod unlocking device is prevented when the switch is not in correct position.

The means for locking the lock roollocking device is shown in Fig. 9 of the drawing. A solenoid 55 has a core 56 adapted to engage a recess in the plunger 12 to lock the same against movement in case the unlocking hasnot beenperformed asa preliminary to a switch movement."

its pivot.

A circuit closer 57 is arranged to be closed by the core 56 when the solenoid 55 is energized. This circuit closer closes a break in a circuit to the motors.

In Fig. 5 is shown a return impulse generator consisting of two coils 58 and 59 and a permanent magnet armature 60. To armature 60 is fastened sleeve 61 which can be raised by lifting arm 6:2 through the shoulder 63 or 64 on collar 65 of shaft 5. A dog 66 on the end of the arm engages a notch in the rod 61 to lift the armature when a shoulder 63 or 64 lifts the arm. A screw 67 mounted in the framepiece 68 is arranged to trip the dog from engagement with the 7 rod to permit the descent of the rod and armature to normal position. At 88 is shown a dash pot which will retard the downward movement of the armature. A current impulse is generated by the quick movement of the armature away from the coils when the arm is lifted.

In Fig. 9 is shown a second impulse generator 71 which is controlled by the movement of the plunger 12. Two coils 69 and 70 are influenced by a polarized armature shown at 71 to generate a current impulse for the operation of releasing mechanism at the tower. To armature 71 is fastened stem 72 which can be quickly raised by arm 73 through dog 74 to generate a current in the coils 69 and 70.

The weighted end of the arm 73 is adapted to be elevated by the engagement there with of the lifting arm 7 5 pivoted at 76 on the standards 77. A roller 78 on the lifting arm is engaged by the cam lug 79 on the plunger 12 to swing the lifting arm about The weight 89 of the arm 73 is held in elevated position through the agency of the latch 80 while it is impelled by the spring 81 to move the shoulder 82 thereon beneath the edge 83 on the arm 73. At the same time the dog 74 at the other end of the lever will be caused by the spring 84 to engage the notch 85 in the stem 72.

Now in the movement of the plunger'12 to the right, or to locking position, the lug 79 strikes the projection 86 on the latch member 80 to release the weight and thereby move the polarized armature 71 through the field of the coils 69 and 70 to generate a current impulse therein. As the stem 72 is brought to its elevated position the dog 74 will engage the stop screw 87, whereupon the dog 74 is withdrawn from the notch 85 and the stem and armature will descend to their lowermost and normal position.

In the diagrammatic view comprised in Fig. 10 the circuit connections made use of in the operation of the switch machine are indicated. At a is shown a conductor leadingthrough the. circuit controller 17 andv the solenoid 49 to the common return conductor indicated at X. Current supplied to this circuit from, for instance, a signal station will operate the locking device oper ated by the solenoid to hold the shaft 5 against rotation. At the same time the branch circuit indicated as a is closed to energize the unlocking coil 13 to move the locking plunger 12 to unlocking position. The movementof the plunger 12 actuates the circuit controller 17 to break the circuit a and close a new set of contacts in a circuit 0.

At Z2 is indicated a circuit that is used in performing the second. stage of operation thatof moving the throw rod 2 to move the switch. This is done by applying current to the circuit 6 and thus energizing for instance the magnet 29, the currentpassing also through the circuit controller 14-, solenold 55, and' thence to common return conductor X. The energization of solenoid '55 moves the core of this solenoid to locking position and closes a circuit at 5?. The shunt circuit 1) is thus established through the motor 8 and thence to common return X.

The third-stage, or the locking of the switch, is performedby impressing current on the circuit indicated at 0. Current will then flow in at circuit controller 17, thence to locking coil 13 and thence to common returnX.

A circuit indicated at (Z provides a path for the return impulse current generated in the coils 69 and 70. The direction of flow of the current in this circuit is controlled by. the circuit controller 17. A corresponding circuit, (Z, is associated with the circuit controller 14 and coils 58 and 59.

In operation current supplied to the locking device 19 will lock the shaft 5 against rotation and at the same time operate the circuit closer 53 to control the supplyof current to the unlocking coil of the double solenoid. .The plunger 12 will thereupon move to the left to unlocking position at the same time raising the weighted end of the generator arm and operating the circuit controller 17 to bridge a palr of contacts to close a break in a circuit leading to the locking coil 13 of the double solenoid and breaking the circuit through the locking device 19.

The shaft 5 being unlocked current may now be supplied through one or the other ofthe left hand contacts of controller 1 1, according to the position of the controller, through one or the other magnet 29 or 30, and through locking magnet 17 to the motor 3..

' The motor 3 will now rotate the shaft 5 in the direction determined by the magnet 29 or 30 to move the switch 1. At the completion of the movement the return impulse generator 60 will be operated to indicate at the tower that the switch hasbeen moved.

At the same time the operation of the switch moving mechanism will break the motor circuit at the controller 1%.

The apparatus is now in condition to have current supplied to the locking coil 13 through the circuit controller 17'. The movement of the locking mechanism not only secures the lock rod but also unlatches the weighted arm whereupon the weight, which was raised by the unlocking operation, can descend to generate a return impulse in the manner already described.

It will be seen that the switch lock rod 8 cannot be unlocked until the switch operating shaft 5 has first been locked against rotation and that, on the other hand, the means 17 for locking the plunger 12 will be actuated to prevent operation of the lock rod locking mechanism while the motor 3 is operated to move the switch.

What is claimed, is

1. A switch machine comprising: a switch throwing means, a switch locking means, and means included in the switch machine for locking either of said means against operation and causing the actuation of the other means.

2. A switch machine comprising: a switch throwing means, a switch locking means. and a locking device for said switch throwing means operative in locking position to cause said locking means to unlock said switch.

3. A switch machine comprising: a switch throwing means, a switch locking means, and a locking device for said switch, locking means operative in locking position to cause said switch throwing means to throw said switch.

4. A switch machine comprising: a switch throwing means, a switch locking means, and a locking device for each means operative in its locking condition to cause the actuatio of the other means.

5. A switch machine comprising: a plurality of means for moving and locking the switch, means for operating said means, and a locking device for one of said means which when in its locking position causes the opcrating means to actuate the other of said means.

6. A switch machine comprising: a plurality of means for controlling a switch, means for operating said means, and a locking device for each of said means operative in its locking position to cause the actuation of the other means.

7. A switch machine comprising: a plurality of means for moving and locking the switch, electrically operated means for controlling said means, an electrically operated locking device for each means which when in its locking position causes the supply of current to the controlling means to actuate the other means.

8. A switch machine comprising: a pluaaaases rality of means for moving and locking the switch, power operated actuating means controlling said means, a locking device for one of said means which when in its locking position controls the supply of power to the actuating means for controlling the other of said means, and means operated by the movement of the actuating means for cutting off the supply of power to the locking device.

9. A switch machine comprising: a plurality of means for moving and locking the switch, power operated actuating means controlling said means, an auxiliary locking device for each means which when in its locking position permits the supply of current to the actuating means for controlling the other means, and means operated by the movement of the actuating means for cut-- ting off the supply of current.

10. A switch machine comprising: a lock rod and a throw rod connected to a switch, actuating means for unlocking and locking said lock rod, actuating means for said throw rod, an auxiliary locking device for the lock rod which when in its locking position acts to permit the operation of the throw rod actuating means. v

11. A switch machine comprising: a lock rod and a throw rod connected to a switch, actuating means for unlocking and locking said lock rod, actuating means for said throw rod, a locking device for the throw rod which when in its locking position causes the operation of the actuating means for the lock rod, and means actuated by the movement of the lock rod actuating means for interrupting the operation of the throw rod locking device.

12. A switch machine comprisingza lock rod and a throw rod connected to a switch,

actuating means for unlocking and locking said lock rod, actuating means for said throw rod, an auxiliary locking device for the lock rod which when in its locking position causes the operation of the actuating means for the throw rod, and controller means actuated bythe movement of the switch for causing the auxiliary locking device to move from its locking position, i

13. A switch machine comprising: a lock rod and a throw rod connected to a switch, actuating means for unlocking and locking said lock rod, actuating means for said throw rod, an auxiliary locking device for the throw rod which when in its locking position causes the operation of the actuating means for the lock rod, an auxiliary locking device for the actuating means of the lock rod which when in its locking position causes the operation of the actuating means for the throw rod, and controller means actuated by unlocking, moving and locking the switch for interrupting the operation of the auxiliary locking devices.

let. A switch machine comprising: a plu' rality of means for moving and locking the switch, electrically operated power actuating means controlling said means, an electrically operated locking device for one of said means which when in itslocking position causes the supply of current to the ac tuating means for the other of said means.

15. A switch machine comprising: a plurality of means for movingvand locking the switch, electrically operated power actuating means controlling said means, an electrically operated locking device for each means which when in its locking position causes the supply of current to the actuating means to control the other means.

16. A switch machine comprising: a plurality of means for moving and locking the switch, electrically operated power actuating means controlling said means, an elec: trically operated locking device for one of said means which when in its locking position causes the supply of current to the actuating means for the other of said means, and means operated by the movement of the actuating means for cutting oil the supply of current to the locking device.

17. A switch machine comprising: a plurality of means for moving and locking the switch, power operated actuating means controlling said means, a locking device for each means which when in its locking posi-- tion causes the supply ofpower to the actuating means to control the other means, and means operated by the movement of the actuating means lor cutting off the supply of power to thatlocking device to which power has been supplied.

18. A switch machine comprising: a lock rod and a throw rod connected to a switch, actuating means for unlocking and locking said lock rod, actuating means for said throw rod, means for supplying power to said throw rod actuating means, a locking de vice for the throw rod which when in its locking position causes the supply of power to the actuating means for the lock rod, and controller means actuated by the movement of the actuating means for the lock rod for cutting ofi the supply of power to the looking device for the throw rod.

19. A switch machine comprising: a lock rod and a throw rod connected to a switch, electrically operated actuating means for said throw rod, actuating means for said throw rod, means for supplying power to said throw rod actuating means, an electrically operated locking device for the throw rod which when energized and in its looking position causes the supply of current to the actuating means for the lock rod, and controller means actuated by the movement of the actuating means for the lock rod for cutting off the supply of current to thelocking device for the throw rod.

' 20. A switchmachine comprising: a lock in its locking position causes the supply of power to the actuating means for the throw v21. A switch machine compri ing: a lock rod and a throw rod connected to a switch, actuating means for unlocking and locking said lock rod, means for supplying power to said lock rod actuating means, electrically operated actuating means for said throw rod, and an electrically operated auxiliary locking device for the lock rod which when in its locking position causes the supply of current to the actuating means for the throw rod. r g

22. Aswitch machine com 'n'ising: a lock rod and a throw rod connected to a. switch, a'ctuatingmeans for unlocking and locking said lock rod, means for supplying power to said lock rod actuating means, electricaily operated actuatingmeans for said throw rod,'an electrically operated auxiliary locking device for the lock rod which when in its rod.

' locking position causes the supply of current to the actuating means for the throw rod,

' and controller means actuated bv the move-- mentof the switch for cutting off the supply of current to the auxiliary locking device.

23. A switch'machine comprising: a lock rod and a throw rod connected to a switch, actuating means for unlocking and locking said lock rod,- actuating means for said throw rod, a locking device for the throw rod which when in its lockingposition supplies power to the actuating means for the lock rod, and an auxiliary locking device for the actuating means of the lock rod which when in its locking position supplies power to the'actua'ting means for the throw rod. r r V 24;.Aswitch machine comprising: alock rod and a throw rod connected to a switch, electrically operated actuating means For unlocking and locking said lock rod, electrically operated actuating means for said throw'rod, an. electrically actuated locking device'for the throw rod which when in its locking position supplies current to the actua'ting means for thelock rod, and an electrically actuated auxiliary locking device for the actuating means of the lock rod which when in its locking position causes the supply of current to the actuating means for the throw rod.

the throw rod which when in its locking p0 sition supplies current to the actuating means for the lock rod, an electrically actuated auxiliary locking device iior the actuating means of the lock rod which when in its locking position causes the supply of current to the actuating means of the throw rod, and controller means actuated by unlocking, moving and locking of the switch for cutting off the supply of currentto the locking devices.

26; A switch machine comprisin two movable members for moving and locking a switch, means for moving each of said mcmbers, means for locking each of said members, and means actuated by one of said members for controlling the means for locking the other member.

27. A switch machine comprising: two movable members for moving and locking a switch, meansfor moving each of said members, means for locking each of said memers, and means actuated by one of said locking means for controlling the means for moving the other member.

28. A switch machine comprising: two movable members for moving and locking a switch, means for moi'ing each of said mcmbers, means for locking each of said members, and means actuated by either of said members for controlling the means for loclc ing the other member.

29. A switch machine comprising: two movable members for moving and locking a switch, means for moving each oi said members, means for locking each of said members, and means actuated by either of said locking means for'controlling the means for moving the other member.

30. A switch machine comprising: two movable members or moving and locking a switch, means for moving each of said members, and means actuated by either of said members for controlling the means for moving that member.

31. A switch machine comprising: two mo cable members for moving and locking a switch, means for moving each of said members, means for locking each of said members, and means actuated by one of said members for controlling the means for moving that member and the means for locking the other member.

' 32. A switch machine comprising: two movable members for moving and locking a switch, means for moving each of said incinbers, means for locking each of said members, and means actuated by either of said members for controlling the means for moving that member, and the means for locking the other member. 7

33. A switch machine comprising: two movable members for moving and locking a switch," means for moving each of said members, means actuated by the means for moving either of said members for controlling the means for locking the other member, and means actuated by the means for looking either member for controlling the operation of the means for moving the other member.

34. A switch machine comprisin two movable members for moving and locking a switch, electrically operated means for moving each of said members, electrically operated means for locking each of said members, a circuit controller actuated by the means for moving either of said members for controlling the means for locking the other member, and a circuit controller actuated by the means for locking either member for controlling the operation of the means for moving the other member.

35. A switch machine comprisin a switch moving member, a switch locking member, means for locking the switch mov ing member against movement, means for moving the switch locking member, means for locking the locking member against movement, means controlled by the means for locking the switch moving member for actuating the switch locking member, and means controlled by the switch moving member for controlling the means for locking the locking member.

36. A switch machine comprising: a rotatable member, a solenoid, a core for preventing the rotation of the rotatable member, a reciprocating member, electrical means for reciprocating said member, electrical means for locking said member against reciprocation, a circuit controller connected to said core arranged to control the means for actuating the reciprocating member, and a circuit controller connected to said rotatable member and arranged to control the reciprocating member locking means.

87. A switch machine comprising: a reciprocating member for locking and unlocking a switch, means for locking said reciprocating member against movement, a rotatable member for moving a switch, means for locking said rotatable member against movement, means for operating each of said members, and means actuated by the reciprocating member for controlling the locking means for the rotatable member.

38. A switch machine comprising: a re ciprocating member for locking and unlocking a switch, means for locking said reciprocating member against movement, a rotatable member for moving a switch, means for locking said rotatable member against movement, means for operating each of said members, and means actuated by therotatable member for controlling the locking means for the reciprocating member.

39. A switch machine comprising: a reciprocating member for locking and unlocking a switch, means for locking said reciprocating member against movement, a rotatable member for moving a switch, means for locking said rotatable member against move ment, means for operating each of said members, and means actuated by either of said members for controlling the locking means of the other member.

l0. A switch machine comprising: a reciprocating member for locking and unlock: ing a switch, a solenoid having a core for locking said reciprocating member against locking said reciprocating member against movement, a rotatable member for moving a switch, a solenoid having a core for locking said rotatable member against movement, an electric motor for actuating said reciprocating member, an electric motor for actuating said rotatable member, a circuit controller actuated by either of said membore for breaking a circuit through the look ing solenoid of the other member, and a circuit controller actuated by the core of either solenoid for closing a circuit through the motor for actuating the other member.

42. A switch machine comprising: a lock rod, two solenoids, a locking member for said lock rod constituting the core of one of said solenoids, an auxiliary locking member for locking the locking member constituting the core oi the other solenoid, a throw rod, an actuating means for said throw rod, a locking means for said throw rod, a circuit controller connected to the locking member for controlling the throw rod locking means, and a circuit controller connected to the auxiliary locking member for controlling the throw rod actuating means.

43. A switch machine including a rotatable member, a solenoid, a core for said solenoid, and means connected to said solenoid for preventing the rotation of the rotatable member.

4A. A switch machine including a rotatable member, a solenoid, a core for said solenoid, and means connected to said core for preventing the rotation of the rotatable member, and a circuit controller connectedto said core.

4:5. A switch machine comprising: a lock rod, a locking member for said lock rod, means for moving said locking member into Copies of this patent may be obtained for and out of locking position, a circuit controller connected to said locking member, an

auxiliary locking device for said locking member, and a circuit controller connected to said auxiliary locking device.

46. A switch machine comprising: a lock rod, two solenoids, a locking member for said lock rod constituting the core of one of said solenoids, and an auxiliary locking member for locking the locklng member constituting the core of the other solenoid.

47. A switch machine comprising: means for moving a switch, a rotary motor for actua'tingsaid means, a differential transmis sion mechanism connected to the shaft of 7 said motor, a friction drum included in said transmission mechanism, a friction band adapted to engage the periphery of said drum, a member connected to the ends of said band for causing said band to grip said drum, a pivoted support for said member, a brake shoe carried by said support, a magnet for moving said member and said pivoted support to hold said drum against rotation, and means included in the switch machine. for controlling the energization of said magnet.

48. A switch machine comprising: a throw rod, a lockrod, a rotatable shaft at right angles to said throw rod, a crank on said shaft arranged to actuate'said throw rod, a reciprocating rod on the other side of i,255,aes

rod, a reciprocating rod on the other side of said throw rod and between said throw rod and said lock rod for locking and unlocking said lock rod, a circuit controller between said lock rod and said throw rod actuated by said rotatable shaft, and a circuit controller between said throw rod and said lock rod actuated by said reciprocating rod.

. Y 50. A switch machine comprising: a. throw rod, a rotatable shaft at right angles to said throw rod for actuating said throw rod, a circuit controller including a member movable in a path parallel to said rotatable shaft and operated by said shaft, a switch lock rod, a reciprocating shaft at right angles to said lock rod for locking and unlocking said rod, and a circuit controller including a member movable in a path parallel to said reciprocating shaft and operated by said shaft.

51. A switch machine comprising: a throw rod, a rotatable shaft for actuating said throw rod, a crank on said shaft, an in dented slideway in said rod into which said crankenters during a portion of its movement to actuate said rod, said crank being arranged to pass out of said slideway and thus out of engagement with said rod during another portion of its movement, and means carried by said shaft for locking said rod against movement while the crank is out of engagement with said slideway.

Signed at Pittsburgh, in the county of Allegheny, and State of Pennsylvania, this 1st day of February A. D. 1916.

GARDNER B. GRAY.

Witness MAX H. GROLOVITZ.

five cents each, by addressing the Commissioner 0! Patents,

Washington, I). C. 

